TIME Magazine April 21, 2008 Vol. 171 No. 16

• COVER:The Story of Barack Obama's Mother - Barack Obama's greatest influence was a woman most Americans know nothing about. How her uncommon life shaped his views of the world • WORLD: Zimbabwe's Opposition Leader Is This Close...Again - Morgan Tsvangirai has been attacked and arrested for challenging Zimbabwe's despot Robert Mugabe. Now he may be on the verge of unseating him • SOCIETY: On the Colorado Beer Trail - Who needs Napa? Colorado offers fans of craft brews their own playland of tours and tasting bars • PEOPLE: 10 Questions for Randy Pausch - He's a Carnegie Mellon professor with terminal cancer. His stirring final speech became an Internet sensation and the basis for a new book, The Last Lecture. Randy Pausch will now take your questions